You know Trump could have just vetoed the spending bill and then got his shutdown right? Or the Republicans could have not submitted a bill or even voted against with that argument that it was better for Trump to have his way.

This has just legitimized him further in that when push comes to shove people (Democrats) do agree with giving him what he wants. He’s an unchecked bully.
This is not logical it’s easy.

Trump could have just vetoed the spending bill when it came to his desk. He didn’t need the Democrats to bow he just wanted to see if they would.